Tensile Properties of the Mono-material and Multi-Material PLA and ABS Sandwich Structures

The aim of this study was to evaluate the tensile performance of the mono-material and multi-material specimens printed using Fused Filament Fabrication. PLA and ABS were used to print the solid and sandwich structures with a cellular core for the mono-material samples. For the sandwich structures, the multi-material combinations ABS-PLA-ABS and PLA-ABS-PLA were printed. Three different cellular core designs-Honeycomb, Rectangular Longitudinal, and Rectangular Transverse-were selected. The Transverse structure for both PLA and ABS demonstrated the highest strength among the mono-material sandwich specimens, In PLA-ABS-PLA samples, the Transverse structure demonstrated the highest ultimate tensile strength, whereas the Longitudinal structure performed best for ABS-PLA-ABS samples. The Rectangular core samples exhibited higher stiffness than the Honeycomb in the mono-material and multi-material specimens.